Your mobile device has gone over its subscribed data limit the past two months. During this time, you have noticed that the device runs hotter than normal and data speeds seem slower than usual. Which of the following should you consider as a cause for these issues?

A. The device is running low on available storage space.
B. The battery is failing and will need to be replaced.
C. The device is infected with malware.
D. The device needs an operating system update.

D. The device needs an operating system update

Explanation:Operating systems are different programs mainly manufactured by software companies like Microsof,Apple etc, after initially installation are loaded into the computer by a boot program, operating systems manages all of the other application programs in a computer, it requires constant upgrade in order to be able to effectively carry out its activities. Application programs uses the operating system by making requests for services through a defined application program interface (API). Examples include Windows 7, Windows 8, Windows 10, Blackberry OS, Operating system Linux etc.

i'm so sorry that's not a question and this isn't an answer